1 // Copyright 2014 PDFium Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
4
5 // Original code by Matt McCutchen, see the LICENSE file.
6
7 #include "BigIntegerUtils.hh"
8 #include "BigUnsignedInABase.hh"
9
bigUnsignedToString(const BigUnsigned & x)10 std::string bigUnsignedToString(const BigUnsigned &x) {
11 return std::string(BigUnsignedInABase(x, 10));
12 }
13
bigIntegerToString(const BigInteger & x)14 std::string bigIntegerToString(const BigInteger &x) {
15 return (x.getSign() == BigInteger::negative)
16 ? (std::string("-") + bigUnsignedToString(x.getMagnitude()))
17 : (bigUnsignedToString(x.getMagnitude()));
18 }
19
stringToBigUnsigned(const std::string & s)20 BigUnsigned stringToBigUnsigned(const std::string &s) {
21 return BigUnsigned(BigUnsignedInABase(s, 10));
22 }
23
stringToBigInteger(const std::string & s)24 BigInteger stringToBigInteger(const std::string &s) {
25 // Recognize a sign followed by a BigUnsigned.
26 return (s[0] == '-') ? BigInteger(stringToBigUnsigned(s.substr(1, s.length() - 1)), BigInteger::negative)
27 : (s[0] == '+') ? BigInteger(stringToBigUnsigned(s.substr(1, s.length() - 1)))
28 : BigInteger(stringToBigUnsigned(s));
29 }
30
operator <<(std::ostream & os,const BigUnsigned & x)31 std::ostream &operator <<(std::ostream &os, const BigUnsigned &x) {
32 BigUnsignedInABase::Base base;
33 long osFlags = os.flags();
34 if (osFlags & os.dec)
35 base = 10;
36 else if (osFlags & os.hex) {
37 base = 16;
38 if (osFlags & os.showbase)
39 os << "0x";
40 } else if (osFlags & os.oct) {
41 base = 8;
42 if (osFlags & os.showbase)
43 os << '0';
44 } else
45 abort();
46
47 std::string s = std::string(BigUnsignedInABase(x, base));
48 os << s;
49 return os;
50 }
51
operator <<(std::ostream & os,const BigInteger & x)52 std::ostream &operator <<(std::ostream &os, const BigInteger &x) {
53 if (x.getSign() == BigInteger::negative)
54 os << '-';
55 os << x.getMagnitude();
56 return os;
57 }
58